Em-Vent Smoke Detector is for early fire detection with visual release display. The smoke detector includes a mounting base and installation must always be horizontally beneath the ceiling.If automatic detectors are used, the end module must be dismantled from the connection terminal 4 and 5 at WSC 3xx or connection terminal 15 and 16 at WSC 4xx and mounted in the last/only smoke detector. The end module should only be mounted here if smoke detectors are not mounted.